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Analysis of partial discharge detection in power cable by WTST-NST filter technology

Hui Wang、Chengjun Huang、Junhua Liu 等 6 位作者2009-05-30OpenAlex

The objectives of on-line monitoring are to prevent failures, reduce maintenance costs, and predict the life of the power system equipment. It is non-destructive and also cost-effective due to its ability to be applied when the equipments are in-service without taking them off form service. However, on-site partial di…

High voltage insulation and dielectric phenomenaImage and Signal Denoising MethodsPower Transformer Diagnostics and Insulation

COMPORTAMIENTO MICROMAGNÉTICO EN UNA PELICULA DELGADA DE Fe: ANALISIS TEORIO Y EXPERIMENTAL

Andrés C. García Castro、Beatríz Cruz Muñoz、Javier Osorio 等 5 位作者2009-05-30Scientia et technica (Universidad Tecnológica de Pereira)

Se presenta el análisis teórico mediante simulación del comportamiento micromagnético en películas delgadas de hierro puro, usando el software Object Oriented Micromagnetism Framework (OOMMF). Los resultados son comparados con datos obtenidos de manera experimental para una película de Fe crecida mediante la técnica D…

Magnetic Properties and Applications

Point processes for decagonal quasiperiodic tilings

Nobuhisa Fujita2009-05-30arXiv (Cornell University)

A general construction principle of inflation rules for decagonal quasiperiodic tilings is proposed. The prototiles are confined to be polygons with unit edges. An inflation rule for a tiling is the combination of an expansion and a division of the tiles, where the expanded tiles can be divided arbitrarily as far as t…

Supramolecular Self-Assembly in MaterialsQuasicrystal Structures and PropertiesDNA and Biological Computing

CONSTRUCCION DE UNA MAQUINA PARA ENSAYO EN DESGASTE ABRASIVO; SEGUN NORMA TECNICA ASTM G-65

A Jose Luddey Marulanda、Alberto Zapata Meneses、Carlos Augusto Estrada2009-05-30Scientia et technica (Universidad Tecnológica de Pereira)

Se diseño, construyo y puso en funcionamiento una maquina tribológica de desgaste abrasivo, según norma técnica ASTM G65, se realizaron ensayos, demostrando la confiabilidad de la maquina bajo esta norma. La maquina permitirá realizar ensayos confiables de desgaste, siendo otra herramientas para evaluar las caracterís…

Lubricants and Their AdditivesTribology and Wear AnalysisMetal Alloys Wear and Properties

Investigation of partial discharge localization method in time domain in GIS

Junhua Liu、Chengjun Huang、Linpeng Yao 等 6 位作者2009-05-30OpenAlex

It's needed to locate the PD source for identifying the insulation defect which induces PD to happen and eventually causes insulation breakdown in gas insulated switchgear (GIS). A simple and obvious way of PD localization is the time of flight method which is widely used as a part of UHF method. But in application, t…

High voltage insulation and dielectric phenomenaLightning and Electromagnetic PhenomenaGeophysical Methods and Applications

Preparation and X-ray Structures of trans-5,6-Diaryl-5,6-dihydro-1,10-phenanthroline-5,6-diols: Formation of Supramolecular Rod by Hydrogen Bonds

Takanori Suzuki、Youhei Miura、Ryuuichi Tamaki 等 5 位作者2009-05-30Chemistry Letters

Abstract A series of X-ray analyses on the newly prepared title molecules have revealed that the one-dimensional rod-like structures are commonly present in the crystals of trans-dihydrophenanthrolinediols. The architecture is of interest from the viewpoint of supramolecular chirality because homochiral diol molecules…

Molecular Sensors and Ion DetectionCrystallography and molecular interactionsPorphyrin and Phthalocyanine Chemistry

Characteristics of Electomigration & Surface Hardness about Tungsten-Carbon-Nitrogen(W-C-N) Related Diffusion Barrier

Soo-In Kim、Young-Joo Hwang、Dong-Shik Ham 等 11 位作者2009-05-30Applied Science and Convergence Technology

반도체 공정에서 기존 금속배선으로 사용되던 Al을 대체하여 사용되는 금속배선으로는 Cu가 그 대안으로 인식되고 있다. 이는 비저항값이 Al ( $2.66{\mu}{\Omega}$ -cm)보다 Cu ( $1.67{\mu}{\Omega}$ -cm)가 더 작아 RC 지연 시간 (RC delay time)을 극복하기 때문이다. 그러나 Cu의 녹는점은 $1085^{\circ}C$ 로 높지만 저온에서 쉽게 Si기판과 반응하는 특성을 가지고 있고, 또한 Si과의 접착력이 좋이 않는 것으로 알려져 있다. 이러한 이유로 Cu와 Si과의 반응을 방지하고 접착력을 높이기 위하여 확산방…

Metal and Thin Film MechanicsCopper Interconnects and Reliability

Characterization of Al-Doped ZnO Thin Film Grown on Buffer Layer with RF Magnetron Sputtering Method

Y.S. No、Donghee Park、Tae-Whan Kim 等 5 位作者2009-05-30Applied Science and Convergence Technology

Al이 도핑된 투명 전도성 Al:ZnO (AZO) 박막에 대한 RF magnetron sputtering 증착 법을 이용한 저온 최적공정조건을 연구하였다. 투명전극 재료로써의 AZO 박막의 전기적, 결정학적 물성을 최대한 향상시키기 위해서, in-situ상태에서 유리기판상에 최적화된 증착 조건의 AZO 버퍼 층을 삽입하는 이중박막 구조를 제작하였다. RF 인가 전력 $50{\sim}60\;W$ 에서 증착된 버퍼층 위에 120 W의 RF 전력에서 성장한 AZO 박막의 경우, 비저항 $3.9{\times}10^{-4}{\Omega}cm$ , 전하 캐리어농도 $1.22{…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsThin-Film Transistor Technologies

Recent R&D Trends of Solid Oxide Fuel Cell Power Generation System

Seong-Soo Pyo、Tak‐Hyoung Lim、Seung‐Bok Lee 等 6 位作者2009-05-30Journal of the Korean Electrochemical Society

본 논문에서는 고체산화물 연료전지의 스택 제조 및 시스템 연구개발의 최근 연구동향을 살펴보았다. 고체산화물 연료전지는 연료의 화학적 에너지를 전기적 에너지로 변환시킬 수 있는 친환경, 고효율의 전기화학장치이다. 고체산화물 연료전지 발전시스템은 응용분야에 따라 중대형 분산발전, 가정용 열병합 발전, 보조전원 및 휴대용 발전 시스템으로 구분할 수 있으며, 10 kW급 이상의 SOFC 발전시스템의 경우 원통형 셀로 구성된 발전시스템이 연구개발의 주를 이루고 있다. 더불어, SOFC 발전시스템 연구개발의 경우 매년 증가하는 세계 전력소비량에 대응하기 위해 발전시장에 진입…

Perovskite Materials and ApplicationsAdvancements in Solid Oxide Fuel CellsGas Sensing Nanomaterials and Sensors

The Effect of Proton Conductivity of SPEEK Composite Membrane with Organic Compounds for DMFC

Sun Kyoung You、H.J. Kim、Hee‐Sun Shin 等 6 位作者2009-05-30Journal of the Korean Electrochemical Society

Direct methanol fuel cells(DMFCs) are receiving significant attention in the portable power source and electric vehicular transportation because of its high energy efficiency as liquid fuel, low cost, and no requirement of fuel reforming process. In this study, we synthesized the Sulfonated poly(ether ether ketone) (S…

Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials

Acidity Control by On/Off Switching of an Intramolecular NH···O Hydrogen Bond by E/Z Photoisomerization of Cinnamate Framework

Takashi Matsuhira、H. Yamamoto、Taka‐aki Okamura2009-05-30Chemistry Letters

Abstract Acidity control by photoswitching of intramolecular NH···O hydrogen bond using E/Z photoisomerization of cinnamate framework was achieved. According to the photoisomerization, the distance between amide NH and carboxylic oxygen was disgregated, and an intramolecular NH···O hydrogen bond formed in E carboxylat…

Molecular Sensors and Ion DetectionLuminescence and Fluorescent MaterialsPhotochromic and Fluorescence Chemistry

CHARGE TRANSFER FROM MONOLAYERED CdSe/ZnS QUANTUM DOTS TO C 60

Si Xiao、Xiong‐Rui Su、Xiao‐Niu Peng 等 4 位作者2009-05-30Modern Physics Letters B

The interaction between C 60 and quantum dots (QDs) has attracted much attention recently due to its potential applications in solar cells, for example, as a promising renewable energy source. In this paper, monolayer self-assembled CdSe/ZnS core/shell QDs films were prepared and drop-coated with different amounts of…

Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsFullerene Chemistry and Applications

Simulation of cylindrical-face milling and modeling of resulting surface roughness when machining polymeric composites

Mihaiela Iliescu、Paulina Spânu、Maria Magdalena Roșu 等 4 位作者2009-05-30OpenAlex

Polymeric composites materials have been developed to a high extend, lately, because of their very important and special characteristics. Once obtained, parts made of these materials type, often need machining and milling represent an efficient procedure. Simulation of cylindrical-face milling process enables determin…

Advanced machining processes and optimizationEngineering Technology and MethodologiesMaterial Properties and Applications

FAILURE ASSESSMENT OF UHTC PLATE UNDER ELEVATED TEMPERATURE

Tao Zeng、Feifei Zhou、Daining Fang 等 5 位作者2009-05-30Modern Physics Letters B

In the present study, a theoretical model is presented to assess the failure temperature for ultra-high temperature ceramics (UHTCs). Unlike traditional thermal shock theory, the parameters, such as thermal expansion coefficient and Young's modulus, are considered a function of temperature in the present model. The ox…

Advanced ceramic materials synthesisIntermetallics and Advanced Alloy PropertiesAdvanced materials and composites

Position-Dependent Cathode Degradation of Large Scale Membrane Electrode Assembly for Direct Methanol Fuel Cell

Soo‐Kil Kim、Eunsook Lee、Yi-Young Kim 等 6 位作者2009-05-30Journal of the Korean Electrochemical Society

대면적 ( $150cm^2$ ) 막전극 접합체(MEA)를 사용하는 직접메탄올연료전지(DMFC)의 내구성과 관련하여, 장시간 운전에 따른 공기극의 열화 현상을 공기극면의 위치별로 고찰하였다. 500시간 동안 정전류 조건으로 운전한 대면적 MEA를 공기극 입구, 중간, 출구의 세 부분으로 분할 하여 각각의 MEA에 대한 성능을 관찰한 결과, 대면적 MEA 운전시 홍수 (flooding) 현상이 심했던 공기극 출구 쪽 MEA의 성능 저하가 두드러졌다. 이는 홍수 현상에 의한 촉매의 열화 및 GDL의 박리에 의한 것으로 판단된다. 이 중 특히 촉매의 열화 현상과 관련하여,…

Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials

Physical and Electrochemical Properties of Gallium Oxide (β-Ga2O3) Nanorods as an Anode Active Material for Lithium Ion Batteries

Young‐Jin Choi、Ho-Suk Ryu、Gyu‐Bon Cho 等 6 位作者2009-05-30Journal of the Korean Electrochemical Society

고순도의 $\beta-Ga_{2}O_{3}$ 나노로드(nanorods)가 니켈산화물 나노입자를 촉매로 사용하고 갈륨금속분말을 원료물질로 이용하여 화학기상증착법으로 합성되었다. 전계방출형 주사전자현미경을 이용하여 $\beta-Ga_{2}O_{3}$ 나노로드를 관찰한 결과, 평균직경은 약 160 nm 그리고 평균길이는 $4{\mu}m$ 였으며 vaporsolid(VS) 성장기구를 통하여 성장되었음을 알 수 있었다. X-선 회절시험과 고분해능 투과전자 현미경을 이용한 결정구조 분석 결과, 합성된 나노로드의 내부는 단사정계 결정구조를 가지는 단결정의 $\beta-Ga_{2…

Advanced Photocatalysis TechniquesZnO doping and propertiesGa2O3 and related materials

Millimeter-Scale Aligned Carbon Nanotubes Synthesized by Oxygen-Assisted Microwave Plasma CVD

Kim Ys、W.S. Song、S.Y. Lee 等 5 位作者2009-05-30Applied Science and Convergence Technology

본 연구에서는 철(Fe)을 촉매금속으로 사용하고 마이크로웨이브 플라즈마 화학기상증착법(microwave plasma CVD)을 이용하여 얇은 다중벽 탄소나노튜브를 합성하였다. 촉매금속으로 사용된 철은 직류 마그네트론 스퍼터를 사용하여 증착하였으며, 탄소나노튜브의 합성에는 플라즈마 공급원인 수소( $H_2$ ), 탄소 공급원인 메탄( $CH_4$ )과 함께 미량의 산소( $O_2$ ) 또는 아르곤(Ar)과 함께 물을 수증기의 형태로 사용하였다. 산소 또는 수증기의 추가에 따른 탄소나노튜브의 성장률의 변화를 주사전자현미경으로 조사하였으며, 결정구조를 투과전자 현미경을…

Carbon Nanotubes in CompositesGraphene research and applicationsSilicon Nanostructures and Photoluminescence

Magnetic and structural anomalies of NanC60 (n = 2, 3)

V. A. Kulbachinskiı̆、Boris M. Bulychev、В. Г. Кытин 等 9 位作者2009-05-30Open Physics

Abstract Sodium fullerides NanC60 (n = 2, 3) have been synthesized by a liquid phase reaction and investigated with X-ray diffraction (XRD), nuclear magnetic resonance (NMR), electron paramagnetic resonance, and differential thermal analysis. XRD data indicate that the crystal structure of Na2C60 at 300 K is face cent…

Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications

A phenotypic study ofTFS1mutants differentially altered in the inhibition of Ira2p or CPY

Aurélie Gombault、Jonas Warringer、Robert Caesar 等 9 位作者2009-05-30FEMS Yeast Research

The Saccharomyces cerevisiae protein Tfs1p is known as a dual protein. On the one hand, it inhibits the carboxypeptidase Y protease, and on the other, it inhibits Ira2p, a GTPase-activating protein of Ras. We managed to dissect precise areas of Tfs1p specifically involved in only one of those functions. Based on these…

Protein Kinase Regulation and GTPase SignalingFungal and yeast genetics researchEnzyme Structure and Function

Near-infrared Luminescence from Ytterbium(III) Ternary Complexes by Visible-light Excitation of Attached Chlorophyll Derivatives

Qianming Wang、Shin‐ichi Sasaki、Hitoshi Tamiaki2009-05-30Chemistry Letters

Abstract Ytterbium complex of 1,4,7-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecane was assembled with several chlorophyll derivatives bearing a carboxy group in organic solvents. Visible-light sensitization of specific chlorophylls caused a rise of near-infrared emission from Yb3+, due to triplet excited energy tr…

Magnetism in coordination complexesLuminescence and Fluorescent MaterialsLanthanide and Transition Metal Complexes